AFR BBC 305cc Marine Rectangle Port Cylinder Heads Chevy Big Block 509 2100B. This product data sheet is originally written in English. AFR Direct Master Warehouse Distributor - All AFR Products Available. AFR 305cc BBC Rectangle Cylinder Heads. AFR is proud to announce their new BBC Marine Cylinder Head! This AFR 305cc marine rectangle port heads feature partially inconel exhaust valves, hydraulic roller springs, hard coat anodizing and high quality components throughout. Recommended for moderate street, or street/strip builds with displacements up to 509 cubic inches, operating up to 6500 RPM. Also available with 100% CNC chambers for increased air flow (see chart). Component upgrades and machining options are available…

AFR Direct Master Warehouse Distributor - All AFR Products Available. AFR 305cc BBC Rectangle Cylinder Heads. AFR is proud to announce their new BBC Marine Cylinder Head! This AFR 305cc marine rectangle port heads feature partially inconel exhaust valves, hydraulic roller springs, hard coat anodizing and high quality components throughout. Recommended for moderate street, or street/strip builds with displacements up to 509 cubic inches, operating up to 6500 RPM. Also available with 100% CNC chambers for increased air flow (see chart). Component upgrades and machining options are available to customize AFR Heads to your specific build. AFR Part # 2100B. There are many different options available for AFR heads, please…